<template>
	<view>
		<view class="header w100 flexw" :style="{height:customBar}">
			<view class="placeholder" :style="{height:statusBar}"></view>
			<view class="flex w100">
				<input class="input" :focus="true" @confirm="doneInput" type="text" confirm-type="search"
					:adjust-position="false" @input="onInput" placeholder="搜索城市" v-model="searchValue" />
				<view class="back_div fsmall bold blue" @tap="back()">
					取消
				</view>
			</view>
		</view>
		<scroll-view class="w100" scroll-y="true" :scroll-into-view="scrollIntoId" :style="{height:scrollHeight}"
			@touchmove.stop.prevent>
			<view v-if="disdingwei" id="hot">
				<!-- 定位模块 -->
				<view class="dingwei">
					<view class="grey flexa fsmall">
						当前定位
					</view>
					<view class="dingwei_city">
						<view class="dingwei_city_one" @tap="back_city(position,true)">
							{{position?position.city:'定位失败'}}
						</view>
						<view class="bold blue fmiddle" @click="getWarpweft">
							<text>{{po_tips}}</text>
						</view>
					</view>
				</view>

				<!-- 最近模块 -->
				<!-- <view class="dingwei" v-if="cacheLocation">
					<view class="grey flexa fsmall">
						最近访问
					</view>
					<view class="dingwei_city dingwei_city_zuijin">
						<view class="dingwei_city_one" v-for="(item,index) in cacheLocation" :key="index"
							@tap="back_city(item)">
							{{item.city_name}}
						</view>
					</view>
				</view> -->
				<!-- 热门 -->
				<view class="dingwei" v-if="hotCity">
					<view class="grey flexa fsmall">
						热门城市
					</view>
					<view class="dingwei_city dingwei_city_zuijin">
						<view class="dingwei_city_one" v-for="(item,index) in hotCity" :key="index"
							@tap="back_city(item)">
							{{item.city_name}}
						</view>
					</view>
				</view>
			</view>

			<!-- 城市列表 -->
			<view v-if="searchValue == ''" v-for="(item, index) in list" :id="item.id" :key="item.id">
				<view class="city-div" @click="back_city(item)">
					<text class="city">{{ item.name }}</text>
				</view>
			</view>
			<!-- 搜索结果 -->
			<view class="city-div" v-for="(item, index) in searchList" :key="index" @click="back_city(item)">
				<text class="city">{{ item.name }}</text>
			</view>
			<view class="placeholder footer"></view>
		</scroll-view>
		<!-- 右侧字母 -->
		<view class="letters" id="list" v-if="searchValue == ''" @touchstart="touchStart"
			@touchmove.stop.prevent="touchMove" @touchend="touchEnd">
			<view class="fmin" v-for="item in letter" :key="item.idx">{{ item.idx }}</view>
		</view>
		<!-- 选中之后字母 -->
		<view class="mask" v-if="touchmove">
			<view class="mask-r bold">{{scrollIntoId}}</view>
		</view>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				statusBar: '0px',
				customBar: '45px',
				winHeight: 0,
				itemHeight: 0,
				winOffsetY: 0,
				touchmove: false,
				scrollHeight: this.statusBarHeight,
				ImgUrl: this.ImgUrl,
				letter: [],

				searchValue: '',
				scrollIntoId: '',
				list: [],
				tId: null,
				searchList: [],
				showMask: false,
				disdingwei: true,
				cacheLocation: '', //最近访问
				position: {
					city: ''
				}, //定位获取的位置

				po_tips: '重新定位',
				hotCity: '',
				city: '',
				getcity: []
			}
		},
		watch: {
			list() {
				setTimeout(() => {
					this.setList()
				}, 100)
			}
		},

		onLoad() {
			uni.showLoading({
				title: "Loading"
			})
			uni.request({
				url: this.$apiUrl + 'Shop/getAreas',
				method: 'GET',
				complete: (res) => {
					uni.hideLoading();
					this.city = res.data.data[0].sub
					let arry = []
					for (let i in this.city) {
						for (let j in this.city[i].sub) {
							this.getcity.push(this.city[i].sub[j])
						}
					}
					this.list = this.getcity
				}
			})
			this.scrollHeight = uni.getSystemInfoSync().windowHeight - parseInt(this.customBar) + 'px'
			//获取存储的最近访问
			uni.getStorage({
				key: 'location_key',
				success: (res) => {
					this.cacheLocation = res.data
				}
			});
			//获取定位 经度纬度
			this.getWarpweft()
		},
		methods: {
			back() {
				uni.navigateBack()
			},
			setList() {
				uni.createSelectorQuery()
					.in(this)
					.select('#list')
					.boundingClientRect()
					.exec(ret => {
						this.winOffsetY = ret[0].top
						this.winHeight = ret[0].height
						this.itemHeight = this.winHeight / this.list.length
					})

			},
			touchStart(e) {
				this.touchmove = true
				let pageY = e.touches[0].pageY
				let index = Math.floor((pageY - this.winOffsetY) / this.itemHeight)
				if (this.list[index]) {
					this.scrollIntoId = this.list[index].idx
				}
			},
			touchMove(e) {
				let pageY = e.touches[0].pageY
				let index = Math.floor((pageY - this.winOffsetY) / this.itemHeight)
				if (this.list[index] && this.list[index].idx === this.scrollIntoId) {
					return false
				}
				if (this.list[index]) {
					this.scrollIntoId = this.list[index].idx
				}
			},
			touchEnd() {
				this.touchmove = false
				this.touchmoveIndex = -1
			},

			doneInput() {
				uni.hideKeyboard()
			},
			move(e) {
				console.log(e);
			},
			getId(index) {
				return this.letter[index];
			},
			query(source, text) {
				let res = [];
				var self = this;
				let len = source.length
				var text = text.toLowerCase()
				for (let i = 0; i < len; i++) {
					//单字母搜索
					if (text.length == 1 && /^[a-zA-Z]$/.test(text)) {
						let arr = []
						let idx = text.toUpperCase()
						if (idx == source[i].idx) {
							console.log(source[i]);
							return source[i].cities
						}
					}
					//其它搜索
					if (source[i].cities) {
						let _len = source[i].cities.length
						for (var n = 0; n < _len; n++) {
							let _item = source[i].cities[n]
							if (new RegExp('^' + text).test(_item.city_name)) {
								res.push(_item);
								continue;
							}
							if (new RegExp('^' + text).test(_item.city_pinyin)) {
								res.push(_item);
								continue;
							}
							if (new RegExp('^' + text).test(_item.py)) {
								res.push(_item);
								continue;
							}

						}
					}
				}

				return res;
			},

			isString(obj) {
				return typeof obj === 'string';
			},

			onInput(e) {
				const value = e.target.value;
				if (value !== '' && this.list) {
					for (let i in this.list) {
						if (this.list[i].name.indexOf(value) != -1) {
							this.searchList.push(this.list[i])
						}
					}
				} else {
					this.searchList = [];
					this.disdingwei = true
				}
			},

			back_city(item, hasLocation = false) {
				if (item) {
					//是否是定位 
					if (hasLocation) {
						for (let i in this.list) {
							if (this.list[i].name.indexOf(item.city) != -1) {
								item = this.list[i]
							}
						}
					}
					uni.setStorageSync("city", item.name)
					//unshift 把数据插入到首位，与push相反
					if (!this.cacheLocation) this.cacheLocation = []

					this.searchValue = "";
					this.disdingwei = true;
					const arr = this.cacheLocation;
					//数组去重
					function distinct(arr) {
						const newArr = []
						for (let i = 0; i < arr.length; i++) {
							if (newArr.indexOf(arr[i]) < 0) {
								newArr.push(arr[i])
							}
						}
						return newArr
					}
					this.cacheLocation = distinct(arr).slice(0, 5)
					uni.setStorage({
						key: 'location_key',
						data: this.cacheLocation
					});
				}
				this.back()
			},
			getWarpweft() {
				uni.getLocation({
					success: (res) => {
						this.po_tips = '定位成功',
							this.position.city = res.city
					},
					fail: () => {
						this.po_tips = '定位中...'
						setTimeout(() => {
							this.po_tips = '定位失败'
						})
					}
				})
			}
		}
	};
</script>

<style scoped>
	.fsmall {
		font-size: 26rpx;
	}

	.fmiddle {
		font-size: 28rpx;
	}

	.blue {
		color: #007AFF;
	}

	.bold {
		font-weight: 600;
	}

	.flex {
		display: flex;
		justify-content: center;
		align-items: center;
	}

	.mask {
		position: fixed;
		z-index: 3;
		top: 40%;
		left: 40%;
	}

	.mask-r {
		height: 120rpx;
		width: 120rpx;
		border-radius: 60rpx;
		display: flex;
		background: rgba(0, 0, 0, 0.5);
		backdrop-filter: blur(5px);
		justify-content: center;
		align-items: center;
		font-size: 40rpx;
		color: #FFFFFF
	}

	.content {
		height: 100%;
		width: 100%;
		background-color: #ffffff;
	}

	.header {
		width: 100%;
		position: relative;
		z-index: 8;
		background-color: #FFFFFF;
	}


	.back_div {
		width: 100rpx;
		height: 100%;
		display: flex;
		justify-content: center;
		align-items: center;
	}

	.back_img {
		width: 35rpx;
		height: 35rpx;
	}

	.input {
		font-size: 26rpx;
		width: 600rpx;
		height: 60rpx;
		max-height: 60rpx;
		border-radius: 10rpx;
		background-color: #F5F5F5;
		padding-left: 20rpx;
		padding-right: 20rpx;
		box-sizing: border-box;
	}

	.title {
		font-size: 30rpx;
		color: white;
	}

	.show {
		left: 0;
		width: 100%;
		transition: left 0.3s ease;
	}

	.hide {
		left: 100%;
		width: 100%;
		transition: left 0.3s ease;
	}


	.title {
		font-size: 30rpx;
		color: white;
	}

	.letters {
		position: absolute;
		right: 0;
		width: 80rpx;
		color: #333333;
		top: 25%;
		text-align: center;
		font-size: 24rpx;
		font-weight: 510;
	}

	.letters .fmin {}


	.letter-header {
		font-size: 28rpx;
		padding-left: 40rpx;
		box-sizing: border-box;
		display: flex;
		align-items: center;

	}

	.city-div {
		width: 660rpx;
		margin: auto;
		padding: 20rpx 0;
		border-bottom-width: 0.5rpx;
		border-bottom-color: #ebedef;
		border-bottom-style: solid;
		display: flex;
		align-items: center;
	}

	.city {
		font-size: 28rpx;
		color: #000000;
		padding-left: 30rpx;
	}

	.dingwei {
		width: 90%;
		margin: auto;
		padding-top: 25rpx;
		box-sizing: border-box;
		margin-bottom: 26rpx;
	}

	.dingwei .grey {
		margin-bottom: 25rpx;
	}

	.dingwei_city {
		width: 100%;
		box-sizing: border-box;
		display: flex;
		justify-content: space-between;
	}

	.dingwei_city_one {
		height: 60rpx;
		background-color: #F5F5F5;
		border-radius: 30rpx;
		font-size: 26rpx;
		padding: 0 20rpx;
		display: flex;
		justify-content: center;
		align-items: center;
		margin: 0 20rpx 20rpx 0;
	}


	.dingweis {
		width: 32rpx;
		height: 32rpx;
	}

	.dingwei_city_zuijin {
		display: flex;
		justify-content: flex-start;
		flex-wrap: wrap;
	}
</style>
